Sticking Treated Pine to Limestone Blocks

I'm a the final stages of a courtyard deck, I need to mount c 150mm x 35mm dressed treated pine board onto retaining 600mm x 100mm limestone block wall, to create a timber coping that doubles up as a perch/seat in places and a feature in the other. probably looking in total at affixing 20 metres. with half of that cut to lengths to create a curve. Then the plan is to sand , rout a bull-nose and stain to match deck.

The limestone is existing and in good nick but wasnt laid super square, so there maybe a bit of making up to do.

In the past I've had timber pop loose when cemented onto brick, I'm thinking liquid nails - but this pomme isnt that experienced in working with WA's limestone, Temperatures and UV levels.

Any ideas or experiences before I invest in a dozen tubes of glue ?

Had you considered counter sunk bolts?
TM

If using liquid nails in an exposed area [sun or rain] forget it - seen as temporary adhesive only - DAMHIK

Bolts would be a good option or if you must use a glue type of material check out the Sikaflex range - not cheap but you do get what you pay for.

Hope it helps,

Bob

The "Landscape" grade of Liquid Nails available is a very good strong durable glue. It is polyurethane based and not like standard Liqud Nails at all. But it is just as expensive as Sikaflex products (about $16 a cartridge). I think glueing the capping down could prove difficult and messy.

I would be thinking to try the old dependable Dynabolt method to hold down the capping piece. I would set the boltheads into the pine so they dont protrude and filling over them with an acrylic polymer filler once everything was in its final position.

hope this helps DD